von bonhorst



UNITED STATES PATENT OFFICE.

CHARLES VON BONHORST, OF HANCOCK, MARYLAND.

LAMP.

Specification of Letters Patent No. 27,248, dated February 21, 1860.

To all whom it may concern:

Be it known that I, C. VON BoNHoRsT, of Hancock, in the county of lVashington and State of Maryland, have invented a new and useful Improvement in Lard-Lamps; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawing, forming a part of this specilication, in which- Figure l, is a vertical transverse section of a lard lamp constructed with my improvements. Fig. 2, is a vertical longitudinal section. Fig. 3, is a plan or top view. Fig. 4f, is aldetached perspective view of the wick and air tubes, and Fig. 5, a vertical trans'- verse section.

Similar letters of reference, in each of several figures indicate corresponding parts.

My invention consists in the combination of an air space formed in the top of the lamp around the exterior of the wick tubes, with an air space between said tubes and two draft passages, one in the top of the lamp and the other in the hollow pedestal; whereby the partially ignited gases around, as well as between the bases of two intermingling flames are supplied with oxygen, and thereby caused to become fully ignited before they arrive at the top or tip of the intermingled flames.

To enable others skilled in the art,- to make and use my invention, I will proceed to describe its construction and operation.

A, represents the lard chamber. It is mounted on a hollow pedestal B, which has its base C, made like an ordinary candlestick. a, a, are draft passages near the base of' the pedestal and b, o, are passages at the base of the pedestal for waste lard which drips down from the wicks to escape through when the lamp is placed on a hot stove. c 01, is a draft passage formed in the top of the lard chamber.

D, D, are the flattened wick tubes, they are formed on the sides of the air tube E, as shown. These wick tubes extend down from the top of the air tube within about an eighth of an inch of the bottom of the same. Perforations d, al, are formed in the outer sides of the tube so as to allow the lard a free chance to soak into the wick and to rise by capillary attraction; a slight flare is also given to the wick tubes from their base to their top so that the wick shall be loose at their lower ends and slightly compressed at their upper ends. The air tube is made flaring from its base to its top so that the upper ends of the wick tubes shall come very close together, as represented in Figs. l and 5.

In order to apply the combined air tube and wick tubes to the lard chamber, it is necessary to cut a narrow slit in the bottom of the lamp and to introduce the extended end of the air tube through said slit, until the lower ends of the wick tubes nearly touch the bottom of the lard chamber, the air tube thus being made to communicate with the interior of the pedestal, and the wick tube with the interior of the lard chamber. The air tube is now securely fastened and the slit closed tight so that no grease can escape into the pedestal directly Jfrom the lard chamber.

The wicks are introduced into the tubes by means of the Hat plate G, which is provided with a support when not in use at the side of the lard chamber, as shown.

From the above description, it will be seen that if the lard is melted and poured into the lamp andthe wicks lighted, a brilliant single llame from two wicks will be produced, for the relative position of the wick tubes causes the flames to unite, and the heat at the top rarelies the air in the pedestal and consequently induces a continnous supply of oxygen to rush in through the holes a, and pass up through the flaring air tubes to the base of the flames of the two wicks and there mingle with the partly ignited smoke and cause the same to fully ignite before it arrives at the top of the fi'ame. While the smoke is thus being consumed, between the bases of the two flames, a supply of oxygen is induced to pass into the lard chamber above the lard through the a, in the manner and for the purpose herein 10 opening c, and to pass up all around the described. outside of the Wick tubes through passage c The above specification of my impt. in and thus insure perfect combustion about lard lamps signed by Ine this 31st. day of 5 the flame externally as Well as internally. December 1859.

What I claim as my invention and de- C. VON BONHORST. Sire to secure by Letters Patent is- Witnesses:

The combination of the air space c, air- GOODWIN Y. ATLEE,

space E, draft passage 0, and draft passage R. XV. FENWICK. 

